SMC Networks EX600-WD Series, Operation Manual

Page: 53 / 56

- Remote input unit / output unit / Troubleshooting
Problem
No.
Phenomenon Possible causes Investigation and countermeasures
1
All LEDs are
OFF.
Power supply for control is OFF.
Supply 24V DC +/-10% for control power
source.
2
PWR: Red LED
flashing
Output power supply voltage decreased
The power supply voltage for output has
dropped. Check that a voltage of 24
VDC+/-10% is applied.
PWR: OFF
Power supply voltage for control is not
supplied
Supply 24V DC +/-10% for control power
source.
3
MS: Red LED
flashing
The following diagnostic information is
detected.
Remote
Short-circuit of the power supply
voltage for control
Remote
Power supply voltage for control
decreased
Short-circuit of output load
After checking the error contents while
referring to the system diagnostic
information and LED indication, refer to
the following countermeasures.
Check the remote wiring.
MS: Red LED is
ON
Remote malfunction
Replace the remote
If the error is not restored after
replacement, stop using the equipment
and contact your SMC sales
representative.
MS: OFF
(1) Remote not registered
(2) Remote power supply is OFF
(1) Check the registration status of the
remote and perform pairing correctly.
(2) Check that the power supply voltage
for control is supplied to the remote.
4
W-SS: Red LED
flashing
(1) Power supply for the base is OFF
(2) Outside the wireless coverage area
(1) Check that the power supply voltage
for control and input (US1) is supplied
to the base and remote.
(2) The distance which wireless
communication between wireless
systems can be established may have
been exceeded.
Reconsider the operating environment,
such as the installation conditions of the
base and remote.
W-SS: OFF
(1) Remote not registered
(2) Power for control is not supplied
(1) Check the registration status of the
remote and perform pairing correctly.
(2) Check that the power supply voltage
for control is supplied to the remote.